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some other approved, anti-corrosive composition; the joints shall be caulked with
lead and the pipes not less than 6 inches internal diameter for main drains, and 4
inches for branch drains.
(8.) The interior of such pipes, after being laid, shall be cleared from any
projecting portions of cement.
(4.) The drain is not to be filled or covered in until it has been inspected and
tested by the Surveyor or by any other Officer of the Works Department.
(5.) No drain shall be laid on the premises until the drain from the sewer to
the premises has been laid in accordance with the regulations of the Vestry.
(6.) The drains on the premises shall be laid in straight lines wherever possible
and with an even and regular inclination from the lowest level upwards, to the
approval of the Surveyor.
(7.) Each house shall have a separate drain in direct communication with a
sewer unless express consent from the Vestry has been obtained for combined
drainage.
(8.) So much of the work as may be necessary for the connection to the sewer
to the extent of a flap trap (if required), and six feet of pipe will be constructed
by the Vestry's contractor, at the expense of the owner and such an amount as
shall be required by the Vestry's Surveyor must be paid as deposit, previous to
the commencement of the work.
(9.) An interceptor syphon trap shall be placed in the drain on the premises
as near as possible to the sewer, and beyond all branch connections, and an
inspection chamber provided, or syphon only, of approved pattern as will be
directed : and where practicable, with an inlet for the admission of air, the mouth
of such inlet shall be constructed in such a manner as to prevent the admission
of solid matters into the drain.
(10.) At the highest part of the drain, a pipe at least four inches in internal
diameter shall be fixed for the purpose of ventilating the drain, and shall be
carried up to such a height without bends or angles (except where unavoidable),
as will afford a safe outlet for all gases.
(11.) The junction pipes used in the drains shall be those known as Y junctions.
(12.) The inlets to the drains shall be properly trapped with fixed traps, except
inlets used for the purpose of ventilation. Traps known as "bell," "lip," or
" dip," traps shall not be inserted in the drains. The inlets to the drains shall be
outside of the house, except the necessary inlets connected with water-closets.
(13.) The yard gully shall be at least six inches in diameter, and shall have
an outlet connected with the drain at least four inches in diameter, and shall be
covered with an iron, or other approved grating.
(14.) The waste pipes from scullery sinks, baths and lavatories, and all pipes
conveying foul matters to the drains from inside the house (except soil pipes from
water-closets), and every rain water pipe, excepting such as may be used for the
purpose of ventilation, shall be made to discharge over or into a gully connected
with the drain outside the house.
(15.) Drains shall not be laid under any part of a house, if it be practicable to
lay them outside of the house, and in all newly erected structures the soil pipe
of every water closet shall be of lead or iron and shall be placed outside and shall
not be less than four inches in internal diameter.
(16.) The soil pipe shall be continued without diminution of diameter upward
from its junction with the water-closet without bends or angles (except where
unavoidable), to such a height and position as will afford a safe outlet for foul
gases.